Facile preparation of Z-scheme WO 3 /g-C 3 N 4 composite photocatalyst with enhanced photocatalytic performance under visible light

Cui, Lifeng; Ding, Xiang; Wang, Yangang; Shi, Huancong; Huang, Lihua; Zuo, Yuanhui; Kang, Shifei

doi:10.1016/j.apsusc.2016.07.055

Cited by 336 publications

(72 citation statements)

References 41 publications

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“…Therefore, it has stronger redox capability and meanwhile retained its respective visible light absorption feature. Many g-C 3 N 4 based Z-scheme heterojunctions have been reported (such as BiVO 4 /g-C 3 N 4 [32], MoS 2 /g-C 3 N 4 [33], BiOCl/g-C 3 N 4 [34], Ag 3 PO 4 /g-C 3 N 4 [35], WO 3 /g-C 3 N 4 [36], and so on). LaFeO3 (LF) possessed the bandgap of ∼2.36 eV, corresponding the absorption wavelength of about 525 nm [37].…”

Section: Introductionmentioning

confidence: 99%

Superior Adsorption and Photocatalytic Degradation Capability of Mesoporous LaFeO3/g-C3N4 for Removal of Oxytetracycline

Yang

Ruan

et al. 2020

Catalysts

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Mesoporous LaFeO3/g-C3N4 Z-scheme heterojunctions (LFC) were synthesized via the incorporation of LaFeO3 nanoparticles and porous g-C3N4 ultrathin nanosheets. The as prepared LFC were characterized by transmission electron microscopy, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, powder X-ray diffraction, Raman spectra and N2 adsorption analysis. The structural analysis indicated that the reheating process and the addition of NH4Cl in the thermal polymerization were the key factors to get porous g-C3N4 ultrathin nanosheets and to obtain high specific surface areas of LFC. It remarkably enhanced the adsorption capacity and photocatalytic degradation of LFC for removal of oxytetracycline (OTC). The effect of the mass percentage of LaFeO3 in LFC, pH and temperature on the OTC adsorption was investigated. The LaFeO3/g-C3N4 heterojunction with 2 wt % LaFeO3 (2-LFC) exhibited highest saturated adsorption capacity (101.67 mg g−1) and largest photocatalytic degradation rate constant (1.35 L g−1 min−1), which was about 9 and 5 times higher than that of bulk g-C3N4 (CN), respectively. This work provided a facile method to prepare mesoporous LaFeO3/g-C3N4 heterojunctions with especially well adsorption and photocatalytic activities for OTC, which can facilitate its practical applications in pollution control.

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Section: Introductionmentioning

confidence: 99%

Superior Adsorption and Photocatalytic Degradation Capability of Mesoporous LaFeO3/g-C3N4 for Removal of Oxytetracycline

Yang

Ruan

et al. 2020

Catalysts

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“…However, the photocatalytic activity of pristine WO 3 is not high enough for practical use. Therefore, different strategies have been developed to increase the photocatalytic activity of WO 3 , including the preparation of WO 3 with different nanostructures [ 23 ], supporting noble metal Pt/Au/Ag [ 24 , 25 , 26 ], composites with other materials [ 27 , 28 , 29 ], and oxygen vacancy defects [ 30 , 31 , 32 , 33 , 34 ]. The introduction of oxygen vacancies is a simple and efficient strategy to improve the photocatalytic performance of WO 3 and it can greatly increase its conductivity and the absorption of visible light by local surface plasmon resonance (LSPR) in the near-infrared region, yielding an intensity that is comparable to bandgap absorption [ 35 , 36 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Strategy for Synthesizing Non-Stoichiometric Monoclinic Structured Tungsten Trioxide (WO3−x) with Plasma Resonance Absorption and Enhanced Photocatalytic Activity

et al. 2018

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Oxygen vacancy defects play an important role in improving the light-capturing and photocatalytic activity of tungsten trioxide (WO3). However, the hydrogen treatment method that is commonly used to introduce oxygen vacancies is expensive and dangerous. Therefore, the introduction and control of oxygen vacancy defects in WO3 remains a challenge. Here, we demonstrated that oxygen vacancies could be successfully introduced into WO3−x while using a facile method through low temperature annealing in alcohol. The obtained WO3−x samples with optimal oxygen vacancies showed strong absorption of light, extending from the ultraviolet to the visible and near-infrared regions, and exhibits strong plasmon resonance from 400–1200 nm peaking at approximately 800 nm. When compared to pristine WO3, the photocatalytic activity of WO3−x was greatly improved in the ultraviolet and visible regions. This study provides a simple and efficient method to generate oxygen vacancies in WO3 for photocatalysis, which may be applied in the photoelectrochemical, electrochromic, and photochromic fields. Because oxygen vacancy is a common characteristic of metal oxides, the findings that are presented herein may be extended to other metal oxides.

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“…Since this first report, many investigations and characterizations have been published with differing XPS results. [77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93] Selected data are summarized in Ta ble S4 (Supporting Information), giving the binding energies for the C1sa nd N1ss ignals. Intriguingly, in most spectra,t he signal of C1sa ta round2 88 eV dominates the C1sr egion, but there are also spectra in which this peak exhibits the lowest intensity.T he most intense N1ss ignal ranges from 398.0 to 400.06eV ( Table S4).…”

Section: X-ray Photoelectron Spectroscopy Analysismentioning

confidence: 99%

Synthesis, Crystal Structure, and Selected Properties of [Au(S₂CNH₂)₂]SCN: A Precursor for Gold Macro‐Needles Consisting of Gold Nanoparticles Glued by Graphitic Carbon Nitride

Teske

Hansen

Weihrich

et al. 2019

Chemistry A European J

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An ew preparation route is developed for the synthesis of needle-like crystals of [Au(S 2 CNH 2 ) 2 ]SCN, which avoids disproportionation of the Au I salt used as as tarting material. In the crystals tructure, the two crystallographically independent Au III centers are in as quare-planar environment of two S 2 CNH 2 ligands.T he Hirshfelds urface analysis reveals the presence of noncovalent intermolecular S···S interactions, which are essential for the spatiala rrangement of the molecules. Density functional theory (DFT) calculations including dispersion and dampingc orrections result in au nit cell volumev ery close to the value determined experimentally. Thermal decomposition in an inert atmosphere generates black needles with lengths of up to 500 mm. X-ray powder diffraction and pair distribution function analyses demonstrate that the needles are composedo fn anosizedcrystals with av olume-weighted average domain size of 20(1) nm. According to resultso fX -ray photoemission experiments, the black needles are covered by an itrogen-rich carbon nitride with composition near (CN) 2 N. 13 Cs olid-state NMR investigationsi ndicatet hat two different carbon species are present,w ith signals corresponding well to heptazine units as in melon and triazine units as in poly(triazin imide) type compounds. Scanning transmission electron microscopy tomography evidencest hat the needles are composed of slightly elongated nanoparticles.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Facile preparation of Z-scheme WO 3 /g-C 3 N 4 composite photocatalyst with enhanced photocatalytic performance under visible light

Cited by 336 publications

References 41 publications

Superior Adsorption and Photocatalytic Degradation Capability of Mesoporous LaFeO3/g-C3N4 for Removal of Oxytetracycline

Superior Adsorption and Photocatalytic Degradation Capability of Mesoporous LaFeO3/g-C3N4 for Removal of Oxytetracycline

Facile Strategy for Synthesizing Non-Stoichiometric Monoclinic Structured Tungsten Trioxide (WO3−x) with Plasma Resonance Absorption and Enhanced Photocatalytic Activity

Synthesis, Crystal Structure, and Selected Properties of [Au(S₂CNH₂)₂]SCN: A Precursor for Gold Macro‐Needles Consisting of Gold Nanoparticles Glued by Graphitic Carbon Nitride

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Facile preparation of Z-scheme WO 3 /g-C 3 N 4 composite photocatalyst with enhanced photocatalytic performance under visible light

Cited by 336 publications

References 41 publications

Superior Adsorption and Photocatalytic Degradation Capability of Mesoporous LaFeO3/g-C3N4 for Removal of Oxytetracycline

Superior Adsorption and Photocatalytic Degradation Capability of Mesoporous LaFeO3/g-C3N4 for Removal of Oxytetracycline

Facile Strategy for Synthesizing Non-Stoichiometric Monoclinic Structured Tungsten Trioxide (WO3−x) with Plasma Resonance Absorption and Enhanced Photocatalytic Activity

Synthesis, Crystal Structure, and Selected Properties of [Au(S2CNH2)2]SCN: A Precursor for Gold Macro‐Needles Consisting of Gold Nanoparticles Glued by Graphitic Carbon Nitride

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Synthesis, Crystal Structure, and Selected Properties of [Au(S₂CNH₂)₂]SCN: A Precursor for Gold Macro‐Needles Consisting of Gold Nanoparticles Glued by Graphitic Carbon Nitride